Please let me know what you think?

So I had my first period on October 15th-21st after 11 months of my son being born. Here we are cycle day 43 and took a dollar store test two days ago and it was negative. I’ve never missed a period this long, even after starting me periods back after having a baby.

Today I have been experiencing some pulling and pressure pain across my lower abdomen. Could this be a sign of pregnancy? I know I experienced this with all three of my children but confused now if it pregnancy related.

What are your thoughts???